Seeds in the Forest Floor of the Ponderosa Pine Type

Regeneration of forest stands is often complicated by the establishment and competition of brush on logged and burned-over areas. The encroachment of brush in the ponderosa pine type of Idaho, particularly Ceanothus velutinus, Dougl. presents a difficult problem to the forest manager. The brush competition severely reduces the growth rate of associated trees, thus extending the period necessary to grow a crop of trees. This situation may seriously limit the economic production of a wood crop of ponderosa pine. Any approach to the solution of brush problems should include a thorough understanding of brush ecology. Those phases of ecology dealing with reproduction and distribution of brush need special emphasis. It has been assumed that most of the brush on logged or burned-over areas originated from seed stored in the forest floor; yet little is known of the quantity or distribution of these seeds. This study was carried out to learn what kind, number and variability of seed is present in the forest floor, and to investigate the number of seed located in different forest conditions, aspects and soil layers. To achieve the above objectives, 48 square-foot, duff-soil samples were taken in the ponderosa pine type of the Boise Basin Experimental Forest in Idaho. Seeds were separated from the samples and major species identified, pretreated and germinated. Appropriate statistical techniques were employed to determine significant results among the different forest conditions, aspects and soil layers sampled

Changes in storm hydrographs due to roadbuilding and clearcut logging on coastal watersheds in Oregon : project termination report

A cooperative study sponsored by a grant from the Water Resources Research Institute Project No. A-001-ORE, Hydrology of Water Yield Prediction, and funding from the School of Forestry, both of Oregon State University.Keywords: Clearcut logging, Coastal watersheds, Storm hydrographs, Roadbuildin

An impact study of Extension small woodland programs

Published July 1980. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalo

Survival and growth of thirteen tree species in coastal Oregon /

no.2

The Douglas-fir tussock moth

Revised March 1973. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalo

Calibration of time of flight detectors using laser-driven neutron source

The data underpins the results presented in an article published in Review of Scientific Instrument, 86, 073308 (2015